Like koi weight, the weight of a goldfish during its lifetime changes drastically from hatching to adulthood.

When goldfish are hatched, known as fry, their weight is almost immeasurable. An estimated volume measurement of fry in 1 mL is 700 fish. Remember, goldfish fry are smaller than the size of a human eyelash.

Once goldfish have grown to about 1.5" to 2.5" in size, their weight has increased significantly. Some goldfish varieties will have at least 250 fish in just one pound.

As goldfish mature and grow in size, their weight also increases. The guide below will give you an idea of the size compared to the number of goldfish in one pound.